Method of forming tire casings



J. P. KING.

METHOD OF FORMING HRECASINGS- Patented Feb. 21

APPLICATION FILED MAY 29, 1919.

I braided threads is particularly well adapt-' been previouslybraided. 25.

NITED: T T S mamm JOHN"IP.'KI1\TG,.OF rnovinnivonginiion'n ISLAVND, ASSIGNQR or. oNn'HALr TO LEON E.

. 4 DANFORTH, or PROVID NCE,arronursraivn. I

1 METHOD or re ume m crsmes;

1,407,159. p p I I r Applicationifiled May 29,

To all whom itmay'concem; y r

' Be it known that LJOHN P. KING, a cit zen of the United States, and resident of the cityof Providence, in the-county of Providence and State of Rhode Island, have ,t invented certain new and useful Improvements in Methods of Forming Tire Casings, of which the following is a specification. ,Z;

This invention relates to improvements in tire casings and niethodofforming. the same, and has for its object to provide a tire casingmore particularly adapted for use on automobiles, the same being constructed by providing a braided fabric of the re quired width and applying this fabric ina plurality of circuinferentially disposed layers about the casing by stretchingthat. portion of the fabric intermediate its edges to conform to thecontour of the casing.

A further object'of the invention is to era ploy a braided 'fab'ric in theconstruction of tire casings, the same being formed of threads or"strands which have themselves it is well known by those skilledfin ithe art that a braided threadpossesses agreatly f increased percentage ofvstrength over'that of the ordinary twisted thread; also that a braided fabric has a much greater strength than a woven fabric, Weight'for weight.

My improved braided fabric formed of ed for use in the construction of a tire casing owing to the fact that it contains the maximum strength and other required quali- V fications that can possibly be obtained in a fabric'of equal weight. V

With these and ther objects in view,'the

invention consists of certain novel features of construction, as will be more fully de-' scribed, and particularly pointed out in the 1 appended claims.

In the accompanying drawings: 7 Figure 1is a faceview showing a short section of my improved braided fabric; also illustrating a pair of the threads or, strands of which the fabric is formed as being themselves braided. Y t Figure 2-is a plan view illustrating one means by which the fabric may be braided into substantially the form in cross-section it is to assume upon being applied to a tire casing. v t 4' v Figure 3is an edge view of the fabric in flat form, showingthe strengthening, re

' Specification of Letters Patent.

"the fabricf1'3 as braided onto this former is Patented Feb Zi, 1922, 191 9. serial 'N oisodwei i sea in threadsjbraided' into message edges of the-fabric. v V

Figure 4-.+illustratesa strip' of fabrieas being-applied to a tire casing,

igure 5 isfa sectional'elevation of ished tlrecasing.

Figure 1 3 side elevatio i I i ished tirecasing;

By y improved firstbraid a, I

fabrie onv a specially constructed braiding ma'chlne one form of which'is illustrated in Figure 2 and which may be providedwith a former '10 substantially circular or'in the.

shape of a tire casing in cross section; and

exactly the required width tofextendabout and conform; to the surface of the'c asing in crossfisection. Thecdg'es of the fabric being formed with a selvage, the threads of which are doubled-upon themselves, provide in;

Qthereby greatly increasing the strength and wearing quality of this fabric over a fabric formed of unbraided threads. Then a 5 greatly 1 5. creased stitngthendfalSQ P ovide edg s: Wh W notravel. v

in order to obtain a -very closely bra1ded 9 fabric I'employ a special mechanism forbeating up each layer of threads as laid thereby again increasing the strength per square inch of the fabric.

' Inasmuch as the threads of'this braided iOt; V

fabric lie diagonally relative to the edge of the fabric, thisifabric' afterhaving been impregnated with'the usual rubber compound and while still hot may be wounddirectly Y in a spiral form about the circumference of 1 the casing for the purpose'of building up 1 the same. the selvage' edges of the braided strip serving to form the bead of the tirej and owing to the diagonal disposition of the threads those intermediate the edges will automatically adjust themselves and permit the fabric to stretch or accommodate itself to the contour of the casing bothcircularly in transverse section and circumferentially.

After the requisite number of plies or layare largely dependent upon the strength and resisting qualities of the fabric of which itis made, it will be seen that my braided fabric has a number of important advantages over one made of a Woven fabric; first, it possesses a much greater strength over the ordinary fabricof similar weight; second, 0wing to the fact that this'fabric'is braided into the exact shape and size to be naturally wound in a spiral form about the casing in building up the same itw ill naturally lie and conform to the surface both circularly in cross section, and circumferentially of the tire and fit like a glove, thereby greatlyredu'cing the expense inthe construction of the tire; and third, as the fabric is provided with 'selvage edges these edges which form the bead of the tire are naturally of very great strength where increased strength is required. 1 A

I do not Wish to be limited to braiding this fabric on a circular former as the fabric may be braided in any desired shape. I

Having thus described one illustrative embodiment of my invention and the best mode known to me for carrying out mymethod, I desire it to be understood that although specific terms are employed, they are used in a generic and descriptive sense and not for purposes of limitation, the scope of the invention being defined an'dlimited only by the terms of the appended claims.

a I claim l. A'inethod of forming a tire casing, which consists in first braiding a thread or strand forming a braided fabric of said braided threads or strands and applying the fabric so formed in layers about the casing by stretching that portion of the fabric intermediate its edges to conform to the contour of the casing. V

E A method of forming a tire casing, which consists in first forming a braided fabric with a thread or strand ofgreater strength than that of the rest of the fabric, braided into its selvage edgesand applying this fabric in layers about thefcasing by stretching that portion of the fabric intermediate its selvage edgesto conform to the contourof the casing, said strengthened edges forming the bead portion of the casing. I

3. A method of forming a tire casing, which consists in forming abraided thread or strand forming a braided fabric of said braided'threads or strands forming a thread or strand in each selvage edge of a strength greater than that of the rest of the fabric, and applying this fabric in layers about the casing by stretching'that portion of the fab ric intermedlate sald selvage edges While being applied thereto causing the same to conform to the contourofthe casing, said strengthened edges being located at the bead of the casing.

in testimon whereof I. aflix m ,lsi 'nature;

JOHN P. KTNG. 

